Results 41 to 50 of about 165,391 (125)
European Physical Journal C: Particles and FieldsIn this paper, we investigate the gravitational lensing effect and the shadow around a Schwarzschild-like black hole in metric-affine bumblebee gravity, which leads to the Lorentz symmetry breaking.
Xiao-Jun Gao
doaj +1 more source
Roulettes: A weak lensing formalism for strong lensing - I. Overview [PDF]
Class. Quantum Grav. 33 16LT01 (2016), 2016 We present a new perspective on gravitational lensing. We describe a new extension of the weak lensing formalism capable of describing strongly lensed images. By integrating the non-linear geodesic deviation equation, the amplification matrix of weak lensing is generalised to a sum over independent amplification tensors of increasing rank.
arxiv +1 more source
The View from the Top: Visual Intrusion as Nuisance in Fearn v Tate Gallery
The Modern Law Review, Volume 87, Issue 3, Page 697-714, May 2024.In Fearn v Board of Trustees of the Tate Gallery the UK Supreme Court unanimously held that visual intrusions are in principle actionable under the tort of private nuisance. On the facts, a narrow 3:2 majority found that the Tate Modern was liable for the operation of its viewing gallery where the public could see into the claimants’ flats.
Jeevan Hariharan
wiley +1 more source
Angular Cross-Correlation of Galaxies: A Probe of Gravitational Lensing by Large-Scale Structure [PDF]
MNRAS, 294, L18 (1998), 1997 The angular cross-correlation between two galaxy samples separated in redshift is shown to be a useful measure of weak lensing by large-scale structure. Angular correlations in faint galaxies arise due to spatial clustering of the galaxies as well as gravitational lensing by dark matter along the line-of-sight.
arxiv +1 more source
Geochemistry, Geophysics, Geosystems, Volume 25, Issue 2, February 2024.Abstract Owing to their abundance and relative availability on Earth's seafloor, mid‐ocean ridge basalts (MORBs) have a well‐defined chemical element budget, reflected by the low standard deviation associated with typical normal MORB (N‐MORB) composition. However, the exact mechanisms leading to magma differentiation and MORB generation remain debated,
Thomas Duvernay +3 more
wiley +1 more source
Lensing signals from Spin-2 perturbations [PDF]
JCAP01(2016)024, 2015 We compute the angular power spectra of the E-type and B-type lensing potentials for gravitational waves from inflation and for tensor perturbations induced by scalar perturbations. We derive the tensor-lensed CMB power spectra for both cases. We also apply our formalism to determine the linear lensing potential for a Bianchi I spacetime with small ...
arxiv +1 more source
Primordial black holes from axion domain wall collapse
Journal of High Energy PhysicsThe QCD axion can solve the Strong CP Problem and be the dark matter of our universe. If the PQ symmetry breaking scale associated with the axion is below the inflationary reheating temperature, axion strings and domain walls populate the universe.
David I. Dunsky, Marius Kongsore
doaj +1 more source
European Physical Journal C: Particles and FieldsThis research delves into the potential existence of traversable wormholes (WHs) within the framework of modified, curvature based gravity. The modification includes linear perturbations of the matter Lagrangian and the trace of the energy-momentum ...
Niklas Loewer +2 more
doaj +1 more source
The Effect of Weak Gravitational Lensing on the Cosmic Microwave Background Anisotropy: Flat versus Open Universes [PDF]
, 1997 We have studied the effect of gravitational lensing on the Cosmic Microwave Background (CMB) anisotropy in flat and open universes. We develop a formalism to calculate the changes on the radiation power spectrum induced by lensing in the Newtonian and synchronous-comoving gauges.
arxiv +1 more source
The complex theory of gravitational lensing: Beltrami equation and cluster lensing [PDF]
arXiv, 1994 We introduce a new complex formalism to describe arclet fields in clusters of galaxies and derive the appropriate inversion techniques to find the related mass distribution of the lensing cluster. Applying the complex formalism to the statistics of lensed background sources shows that the mean of the axial ratios of locally lensed isotropically ...
arxiv